In loading a lorry, a man lifts boxes each of weight 100n through a height of 1.5m.
how much work does he do in lifting one box?
work done =

The amount of work done in order to lift the box is

Explanation:

Given the weight of each box is

And the man lifts boxes at a height of

We need to find the amount of work done.

The amount of work done is the product of applied force that causes the displacement .

In our problem force is and displacement is  .

Now, work done

So, the amount of work done in order to lift the box is

wavelegth as in spectrum red oygbiv

conservation of mass

mass before something happens = mass afterwards